Technical Note
8/15
www.rohm.com
2010.10 - Rev.
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BD3870FS,BD3871FS,BD3872FS,BD3873FS
●Pin description (BD3872FS)
Pin No. Pin Name Description Pin No. Pin Name Description
1 VIN1 1ch volume input pin 17 SC Serial clock input pin
2 SEL1 1ch input selector output pin 18 SI Serial data input pin
3 VIN2 2ch volume input pin 19 VCC Power supply pin
4 SEL2 2ch input selector output pin 20 CAP
Time constant setting pin for absorbing
switching shock sound
5 A1 1ch input pin A 21 OUT2 2ch output pin
6 A2 2ch input pin A 22 OUT1 1ch output pin
7 B1 1ch input pin B 23 BOUT2 2ch bass filter setting pin
8 B2 2ch input pin B 24 BNF2 2ch bass filter setting pin
9 C1 1ch input pin C 25 BOUT1 1ch bass filter setting pin
10 C2 2ch input pin C 26 BNF1 1ch bass filter setting pin
11 D1 1ch input pin D 27 TNF2 2ch treble filter setting pin
12 D2 2ch input pin D 28 TNF1 1ch treble filter setting pin
13 E1 1ch input pin E 29 SOUT2 2ch cinema surround or SEQ setting pin
14 E2 2ch input pin E 30 SQI2 2ch cinema surround or SEQ setting pin
15 FILTER 1/2 VCC pin 31 SOUT1 1ch cinema surround or SEQ setting pin
16 GND Ground pin 32 SQI1 1ch cinema surround or SEQ setting pin
